raising the nitrate level

例句：

1. 1. The company is raisingfunds to expand its operations.
   该公司正在筹集资金以扩大其业务。
2. 2. Theteam is raising awareness aboutthe importance of environmental conservation.
   团队正在提高人们对环境保护重要性的认识。
3. 3. Thefarmer is raising pigs for meat production.
   这位农民正在饲养猪以生产肉类。